All posts by Kathy Nicholson

SPIE Quantum Communications and Quantum Imaging XIII Conference

brantgibson9 August 2015:

A/Prof Brant Gibson, CNBP CI,  presented a paper at the SPIE Quantum Communications and Quantum Imaging XIII Conference (OP416), San Diego, California, 9-13 August 2015.

The paper presented was titled: ‘Hybrid quantum photonic applications of nanodiamond.’

Abstract:

Fluorescent nanodiamonds (NDs) have a range of unique properties which make them highly desirable for bioimaging applications. Their fluorescence is produced via optical excitation of atomic defects, such as the negatively charged nitrogen vacancy centre, within the diamond crystal lattice. Possessing long-wavelength emission, high brightness, no photobleaching, no photoblinking, single photon emission at room temperature, nanometer size, biocompatibility, and an exceptional resistance to chemical degradation make NDs almost the ideal fluorescent bioimaging nanoprobe. I will discuss these exciting properties in detail and also give some examples of their nano-manipulation and integration with photonic materials for hybrid ND-photonic quantum applications.

 

Roman Kostecki at ICMAT2015

Roman Kostecki28 June 2015:

CNBP researcher Roman Kostecki presented his latest research paper at the 8th International Conference on Materials for Advanced Technologies (ICMAT2015). The conference, twinned with the 4th Photonics Global Conference took place in Singapore 28 June – 3 July 2015.

The paper, titled “Thin-film Polymer Functionalization of Optical Fiber Enabling Multiligand Chemosensing” was published with an author list consisting of Roman KOSTECKI, Sabrina HENG, Heike EBENDORFF-HEIDEPRIEM, Andrew ABELL, and Tanya MONRO.

Abstract:

Silica exposed-core microstructured optical fibers (EC-MOFs) are a platform for distributed, in situ, and/or remote sensors based on fluorescence. The portion of light guided outside of the glass core, often described as ‘evanescent field’, is affected by the refractive index and absorption characteristics of the surrounding medium. This light-matter overlap provides opportunities for fluorometric measurements of the composition and concentration of an analyte along the fiber length. Functionalizing the core with a chemosensor removes the need for chemosensor/analyte premixing. Detection of aluminum cations (Al) is of particular interest as a means to monitor corrosion, human health and the environment.

We demonstrate the first example of a photo-switchable chemosensor for Al detection using a modified photochromic spiropyran (SP-I), which is appended to an ionophore for cation binding. Photochemical switching of the spiropyran allows ion binding to be switched on and off, creating a multiple use chemosensor. The SP-I sensor binds Al or calcium cations as multi- or single-ligand complexes respectively, and was modified for surface attachment. Silane- or polyelectrolyte-based methodology allows subsequent attachment of the SP-I to a glass surface. Studies with the dual ion binding SP-I integrated with the EC-MOF sensing platform provide evidence that covalent attachment is ineffective, where multiligand binding chemosensors are needed. Functionalizing EC-MOFs with a thin-film (50 nm) polymer doped with SP-I demonstrates capacity to use both multi- and single-ligand binding chemosensors. This demonstrates that the integration of photo-switchable chemosensor, thin-film polymer, and silica optical fiber elements creates a sensor capable of multiligand chemosensing anywhere along the fiber’s length. The work demonstrates a new pathway to next generation reusable and continuous operation ion sensing platforms, and that the local molecular environment of a chemosensor affects its function which can be used to control how metal ions interact with chemosensors.

 

5th Asia Pacific Optical Sensors Conference

20-22 May 20Alexandre Francois Low Res Edit 008315: Jeju Island; Korea

Dr Alex Francois presented an invited talk at the 5th Asia Pacific Optical Sensors Conference.

Surface plasmon scattering: an alternative approach for optical fibers biosensors:  Alexandre François, Beniamino Sciacca , Elizaveta Klantsataya, Agnieszka Zuber, Peter Hoffman, Manuela Klinger-Hoffman, Tanya M. Monro

The APOS 2015 continues a series of conferences that are intended to provide a central forum for an update and review of technical information covering wide range of optical sensing fields from fundamental researches to systems and applications. The conference is open to researchers and professionals from not only Asia-Pacific Rim region but also all of the world.

http://www.apos2015.org/index.php

Annemarie is back and at CNBP

17 AAnnemarie Nadortpril 2015:

We are delighted to share great news that Annemarie Nadort decided to join the Macquarie node of CNBP after her recent graduation from the University of Amsterdam.

Annemarie did a co-tutelle PhD project at Macquarie with AI Andrei Zvyagin in the area of advanced imaging.

Her new role within CNBP will be to work with Professor Ewa Goldys on a project exploiting the capability of upconverting nanoparticles to visualise tissue regions.

She will also be exploring the area of fluorescence guided surgery jointly with CNBP PI Professor Brian Wilson.

We wish her all the best, in particular for her recent submission to Nature Methods as first author.

 

Welcome to Kashif and Jason at MQ Node

17 April 2015:Kashif and Jason at MQ

Last week Macquarie node welcomed two new PhD students who joined Ewa Goldys’ group.

Kashif Islam (left) hails from Pakistan. His project is concerned with expanding the range of fluorophores that can be non-invasively quantified in cells and tissues. This work will have components of hardware development, photochemistry and photobiology.  Kashif  will be part of the hyperspectral team working with Martin Gosnell, Ayad Anwer, Biju Cletus, Saabah Mahbub and Aziz Rehman and external partners. We hope he will be able to observe tryptophan, kyneurenine and collagen, which will open up exciting options for CNBP.

Wenjie Jason Chen (right) came from China. He is developing specialised nanoparticles which will be targeted to receptors of interest and deliver their cargo following a trigger. He will be working with Wei Deng and external partners working towards translational medical objectives.

We are excited to have Jason and Kashif here and looking forward to seeing their results soon.

Cutting Edge Speaker at Science Teachers Association Conference

georgiostsiminis13 April 2015: CNBP talks to Science Teachers:

Dr Georgios Tsiminis was invited to represent the University of Adelaide at the Science Teachers Association of South Australia Annual Conference and Expo 2015 as an invited Cutting Edge Speaker.  Hosted at Brighton Secondary School with an audience of Science teachers from around South Australia.

The talk was titled “Listening to molecules using light: optical detection of chemicals” and co-authors include Dr Joanna Brooks (ARC Centre for Research on Ageing, Health and Wellbeing at the Australian National University), Nigel Spooner (IPAS), Tanya Monro (UniSA/CNBP), Fenghong Chu (Shanghai University of Electric Power).

 The talk gave an overview of how light can be used as a tool for detecting chemicals in complex samples and focused on using optical fibres as photonic tools for chemical sensing by Raman spectroscopy. Two examples were given, measuring vitamin B12 in the scope of exploring vitamin B12 deficiency as a modifiable risk factor for dementia and Alzheimer’s; and explosives detection, where Raman spectroscopy was performed using microstructtured suspended core optical fibres to enhance the signal and enable the detection of fundamentally different explosives (TNT and hydrogen peroxide) using the same sensor at quantities of less than a microgram. Both examples highlight the great flexibility of photonic technologies for chemical sensing and establish the cross-disciplinary nature of research undertaken within the CNBP, IPAS and the University of Adelaide.

 

Interdisciplinary Funding Awarded to Whispering Gallery Mode Research

24 MarcAlexandre Francois Low Res Edit 0083h 2015

Congratulations to Prof Andrew Zannettino, Dr Alex Francois and team for winning an $18,000 grant from the University of Adelaide Interdisciplinary Research Fund for their project ‘Diagnosing multipte myeloma: Development of a point of care device for detecting and monitoring serum free light chain levels in serum’.

The project is aiming of using our Whispering Gallery Mode sensor for the detection of light chain antibodies for medical diagnostics applications.